should i stay invested in above mutual fund or redeem & invest in another mutual fund.

Dear Sir,

I am holding investment in following ELSS & sector scheme of Mutual fund,

1) SBI Magnum Tax gain scheme 93-dividend option -Purchase NAV – 54.29 Jan & MAY 2008.
2) Sundaram Tax saver fund – dividend option –Purchase NAV – 15.89 Jan & MAY 2008.
3) Reliance Tax saver fund -dividend option –Purchase NAV – 15.49 Jan & MAY 2008.
4)JM Basic Fund – dividend option –Purchase NAV – 29.55 Jan 2008.
5)Reliance NRF Fund – dividend option –Purchase NAV – 10.23 Jan 2008.
6) TATA Indo-Global Infrastructure fund-Growth option.-Purchase NAV – 10.00 OCT 2007.

My horizon period is 15 years.hence should i stay invested in above mutual fund or redeem & invest in another mutual fund.